After Coventry, Phish broke up for four and half years before returning in 2009. That year it played a festival at the immaculately groomed Empire Polo Fields in Indio, Calif. (also the home of Coachella), but to many fans that felt a world away from the group’s Northeastern roots. So the mere fact of its return to the East Coast with a drama-free festival that was well planned and smoothly operated (and for which the weather cooperated superbly) felt like a much-needed victory.